Blender Git Loki

Fix light probe panels not being visible for Cycles.

Fix T60748: Move GP stroke extremes with noise modifier

Fix T58640: Round corner in edge crease of subdivided surfaces
Fix T60502: Creasing behavior on 2.8 seams wrong

Was a mistake in a boundary vertices sharpness calculation.

Fix T60126: Gradient affects hidden vertices when weight painting

Also includes some minor refactoring: use guard clauses instead of nested conditionals.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D4238

Fix T60742, T55974: crash using mesh/curve surface force fields.

Missing dependency graph relations caused race conditions.

Fix potential invalid memory access in surface force field BVH tree.

Free the BVH tree immediately along with the mesh, otherwise we might access
invalid mesh data.

Differential Revision: https://developer.blender.org/D4201

Fix T60686: Renaming an animated bone breaks its animation

After rename is done we need to make sure all copies of
corresponding datablocks are updated in all dependency
graphs: otherwise bone will have a new name, but animation
will still be using an old one.

Cleanup: space after template bracket

Git: add TAGS & tags to .gitignore

Index files used by emacs, vim and others, for autocompletion and
searching; generated by etags, universal-ctags and others.

Differential Revision: https://developer.blender.org/D4208

Fix T60737: Crash workbench rendering

Addition of clipping from 7467049055a7
didn't account for non viewport display.

3D View: Support vert & weight paint mask clipping

Cleanup: Silence pedantic compiler warning

Was happening in release builds.

Cleanup: Remove unused variable

Fix T60575: Multiresolution Crashes when appliing more subdivisions

The issue was caused by intermediate DerivedMesh being created with
scene's Simplify settings taken into account. This is what happens
when one area makes implicit decisions based on whether passed Scene
pointer is not NULL.

Made it so ignoring simplification serttings is an explicit flag,
which makes it easier to follow what's going on.

Fix T59395: Subdivision modifier with quality 1 crashes blender

This is actually a workaround for the crash in OpenSubdiv.
Topology refiner will have a crash when special conditions
are met:

- Refiner is configured to use infinitely sharp patches.
- Refinement happens for the level 1 (which we call Quality 1 on
Blender side).
- Mesh has non-quad faces.

The workaround is to force refinement to happen to level 2 (or
quality 2 on Blender side) when those conditions are met.

Later on with the next OpenSubdiv update we can remove this
workaround, since there was work done on OpenSubdiv side to
deal better with such configurations.

The modifier will now be somewhat slower, but this will be
compensated with upcoming topology cache enabled by default.

The workaround is done when initializing settings, so the
comparison of topology refiner settings is happening without
any extra workarounds there.

Merge branch 'blender2.7'

Fix full compilation after recent passes changes

Was caused by c9eef249.

3D View: Support edit-mesh clipping (only verts)

We'll need to replace built-in shaders to add support for clipping.

Fix T60112: Smooth crashes w/ multiple views

Fix T60643: BMesh operator enum args fail when unset from Python

Error introduced with bmesh operator enum support: 1e6a5eb087911